NORMAL, Illinois — Annabelle Shaffer turned 16 last month and got her driver’s license a few weeks later. That will make it easier to go to after-school activities at Illinois State University, where she has been taking classes since she was 14. To say she isn’t your typical teenager is an understatement. In addition to taking college courses, she also is assisting physics professors with neuroscience research. This summer, she took classes in neuroscience and calculus at Harvard University. But perhaps it shouldn’t be that surprising. Shaffer said neuroscience has “always been fascinating for me.” While other kids may have received the Operation game as a present, her parents gave her an anatomy book for Christmas when she was in third grade. “We’d go to the library and she’d come…